For Loop Help Needed

1 次查看（过去 30 天）
Sarah
Sarah 2011-10-13
Hey guysss,
So I am trying to write a for loop to automatically detrend my signal until the "constant" value, or 0. I am using an updated detrend function that allows for higher order detrending rather than just linear.
%Detrend
Order.Max = 5;
X = 0:Order.Max - 1;
X = sort(X,'descend');
T1.Prc = detrend(T1.Sig1,Order.Max);
T2.Prc = detrend(T2.Sig1,Order.Max);
T3.Prc = detrend(T3.Sig1,Order.Max);
T4.Prc = detrend(T4.Sig1,Order.Max);
T5.Prc = detrend(T5.Sig1,Order.Max);
for Order.Low = X,
T1.Prc = detrend(T1.Prc,Order.Low);
T2.Prc = detrend(T2.Prc,Order.Low);
T3.Prc = detrend(T3.Prc,Order.Low);
T4.Prc = detrend(T4.Prc,Order.Low);
T5.Prc = detrend(T5.Prc,Order.Low);
end
I keep getting this error: ??? Error: File: fieldanalysisPART1.m Line: 18 Column: 10 Unexpected MATLAB operator.
Can you help me correct this? I essentially want the for loop to detrend the original signal T1.Sig1 with the highest order (for example, Order.Max = 5) and save it to T1.Prc. Then, I want the for loop to detrend T1.Prc with 4,3,2,1, and 0.

请先登录，再回答此问题。

采纳的回答

David Young
David Young 2011-10-13
It would help if you told us which is line 18, but I'm guessing it's probably the one that says:
for Order.Low = X,
since this will provoke the error message you get.
The reason is that you need to provide a simple variable name for the for-loop. You should try replacing the line above with these two lines:
for x = X
Order.Low = x;
(omitting also the extraneous comma). There may be other problems, but that will at least deal with the message you're getting now.
As a side point, instead of
X = 0:Order.Max-1;
X = sort(X, 'descend');
you could write
X = Order.Max-1 : -1 : 0;
  1 个评论
Sarah
Sarah 2011-10-13
That did solve my error, but I don't think it gives me the solution that I want. For example, I essentially want the for loop to be able to do this:
The highest order is 4:
% T1.Prc = detrend(T1.Sig1,4);
% T2.Prc = detrend(T2.Sig1,4);
% T3.Prc = detrend(T3.Sig1,4);
% T4.Prc = detrend(T4.Sig1,4);
% T5.Prc = detrend(T5.Sig1,4);
%
% T1.Prc = detrend(T1.Prc,3);
% T2.Prc = detrend(T2.Prc,3);
% T3.Prc = detrend(T3.Prc,3);
% T4.Prc = detrend(T4.Prc,3);
% T5.Prc = detrend(T5.Prc,3);
%
% T1.Prc = detrend(T1.Prc,2);
% T2.Prc = detrend(T2.Prc,2);
% T3.Prc = detrend(T3.Prc,2);
% T4.Prc = detrend(T4.Prc,2);
% T5.Prc = detrend(T5.Prc,2);
% T1.Prc = detrend(T1.Prc,'linear');
% T2.Prc = detrend(T2.Prc,'linear');
% T3.Prc = detrend(T3.Prc,'linear');
% T4.Prc = detrend(T4.Prc,'linear');
% T5.Prc = detrend(T5.Prc,'linear');
%
% T1.Prc = detrend(T1.Prc,'constant');
% T2.Prc = detrend(T2.Prc,'constant');
% T3.Prc = detrend(T3.Prc,'constant');
% T4.Prc = detrend(T4.Prc,'constant');
% T5.Prc = detrend(T5.Prc,'constant');
^where linear and constant are 1 and 0 respectively

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Numeric Types 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by